超稠油油藏油水倒置成因及含油面积圈定探析——以埕东油田埕911-平1块馆下段为例

发布时间：2018-06-02 00:51

本文选题：超稠油油藏 + 油水倒置　；参考：《油气地质与采收率》2017年05期

【摘要】：埕东油田埕911-平1块馆下段超稠油油藏高部位产水或高含水、低部位产油的"高水低油"生产特征明显,存在油水倒置现象,但其成因尚不明确。基于测井、录井、实验及开发动态等资料,深入分析了该油藏油水倒置的特征及成因。该区块地面原油密度为1.007 6~1.024 8 g/cm~3,大于地层水密度,在重力的作用下,原油克服浮力和毛管压力向构造低部位发生二次运移,是造成油水倒置的主要原因,利用录井和测井等资料进一步证实了该观点。油水倒置油藏的油水分布规律与常规油藏差别较大,用于圈定常规油藏含油面积的一些原则与方法对油水倒置油藏不适用。以探明含油面积圈定为例,针对超稠油油藏复杂的油水分布关系,提出了其含油面积圈定的原则与应注意的问题。
[Abstract]:The production characteristics of "high water and low oil" in the super heavy oil reservoir with high water production or high water cut in the lower member of block Cheng911-Ping 1 in Chengdong Oilfield are obvious, and the phenomenon of inversion of oil and water exists, but the cause of formation is still unclear. Based on the data of logging, experiment and development, the characteristics and causes of oil and water inversion in this reservoir are analyzed. The surface crude oil density of the block is 1.007 ~ 1.024 8 g / cm ~ (-3), which is larger than the formation water density. Under the action of gravity, the crude oil overcomes the buoyancy and the capillary pressure and occurs secondary migration to the lower part of the structure, which is the main cause of oil and water inversion. This view is further confirmed by logging and logging data. The oil-water distribution law of oil-water inversion reservoir is quite different from that of conventional reservoir, and some principles and methods used to delineate the oil-bearing area of conventional reservoir are not suitable for oil-water inversion reservoir. Taking the delineation of proven oil-bearing area as an example, the principle and problems of oil-bearing area delineation in ultra-heavy oil reservoirs are put forward in view of the complex oil-water distribution relationship.
【作者单位】：中国石化胜利油田分公司勘探开发研究院;
【基金】：中国石化科技攻关项目“垦西油田罗322超深层低渗稠油有效开发技术”(P14009)
【分类号】：P618.13;TE345

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